arduino通过自定义协议控制ws2812led全彩彩灯（转）

　　　　　　1、原文地址：https://blog.csdn.net/weixin_46097074/article/details/103719295

1. 1. #include <Adafruit_NeoPixel.h>
   2.  #ifdef __AVR__
   3.  #include <avr/power.h>
   4.  #endif
   5.  #define PIN_LED1_DI 1 // led1 di口
   6.  #define PIN_LED2_DI 2 // led2 di口
   7.   
   8.  #define LED_COMMAND_SET_FLASH 'A' // 设置灯闪烁
   9. #define LED_COMMAND_STOP_FLASH 'B' // 停止灯闪烁
   10.  #define LED_COMMAND_SET_COLOR 'C' // 设置灯颜色
   11.   
   12.   
   13.  char temp;
   14.  char recvData[1024];
   15.  int nRecvDataLen;
   16.  int FlashFlag;
   17.  char FlashValue;
   18.  Adafruit_NeoPixel strip = Adafruit_NeoPixel(8, PIN_LED1_DI, NEO_GRB + NEO_KHZ800);//8代表有8个小灯
   19.  //如果一个板子控制多个灯圈，在这新建，组成数组，然后做处理
   20.  void setup() {
   21.  // put your setup code here, to run once:
   22.  Serial.begin(115200); //设置串口波特率115200
   23.  while (Serial.read() >= 0) {} //清除缓存
   24.  pinMode(PIN_LED1_DI, OUTPUT);
   25.   
   26.  memset(recvData, 0, sizeof(recvData));
   27.  nRecvDataLen = 0;
   28.  FlashFlag=0;
   29.  }
   30.   
   31.  // Fill the dots one after the other with a color
   32.  void colorWipe(uint32_t c, uint8_t wait) {
   33.  for(uint16_t i=0; i<strip.numPixels(); i++) {
   34.  strip.setPixelColor(i, c);
   35.  strip.show();
   36.  delay(wait);
   37.  }
   38.  }
   39.   
   40.  void rainbow(uint8_t wait) {
   41.  uint16_t i, j;
   42.   
   43.  for(j=0; j<256; j++) {
   44.  for(i=0; i<strip.numPixels(); i++) {
   45.  strip.setPixelColor(i, Wheel((i+j) & 255));
   46.  }
   47.  strip.show();
   48.  delay(wait);
   49.  }
   50.  }
   51.   
   52.  // Slightly different, this makes the rainbow equally distributed throughout
   53.  void rainbowCycle(uint8_t wait) {
   54.  uint16_t i, j;
   55.   
   56.  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
   57.  for(i=0; i< strip.numPixels(); i++) {
   58.  strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
   59.  }
   60.  strip.show();
   61.  delay(wait);
   62.  }
   63.  }
   64.   
   65.  //Theatre-style crawling lights.
   66.  void theaterChase(uint32_t c, uint8_t wait) {
   67.  for (int j=0; j<10; j++) { //do 10 cycles of chasing
   68.  for (int q=0; q < 3; q++) {
   69.  for (int i=0; i < strip.numPixels(); i=i+3) {
   70.  strip.setPixelColor(i+q, c); //turn every third pixel on
   71.  }
   72.  strip.show();
   73.   
   74.  delay(wait);
   75.   
   76.  for (int i=0; i < strip.numPixels(); i=i+3) {
   77.  strip.setPixelColor(i+q, 0); //turn every third pixel off
   78.  }
   79.  }
   80.  }
   81.  }
   82.   
   83.  //Theatre-style crawling lights with rainbow effect
   84.  void theaterChaseRainbow(uint8_t wait) {
   85.  for (int j=0; j < 256; j++) { // cycle all 256 colors in the wheel
   86.  for (int q=0; q < 3; q++) {
   87.  for (int i=0; i < strip.numPixels(); i=i+3) {
   88.  strip.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on
   89.  }
   90.  strip.show();
   91.   
   92.  delay(wait);
   93.   
   94.  for (int i=0; i < strip.numPixels(); i=i+3) {
   95.  strip.setPixelColor(i+q, 0); //turn every third pixel off
   96.  }
   97.  }
   98.  }
   99.  }
   100.   
   101.  // Input a value 0 to 255 to get a color value.
   102.  // The colours are a transition r - g - b - back to r.
   103.  uint32_t Wheel(byte WheelPos) {
   104.  WheelPos = 255 - WheelPos;
   105.  if(WheelPos < 85) {
   106.  return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
   107.  }
   108.  if(WheelPos < 170) {
   109. WheelPos -= 85;
   110. return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
   111.  }
   112.  WheelPos -= 170;
   113.  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
   114.  }
   115.   
   116.  void FlashControl(char value) {
   117.  if (value == 'R') {
   118.  theaterChase(strip.Color(127, 0, 0), 10); // Red
   119.  } else if (value == 'G') {
   120.  theaterChase(strip.Color(127, 127, 127), 10);// White
   121.  } else if (value == 'B') {
   122.  theaterChase(strip.Color(0, 0, 127), 10); // Blue
   123. }else{
   124.  theaterChaseRainbow(0);//七色轮闪光
   125. }
   126.  }
   127.  void SetColor(char value) {
   128.  if (value == 'R') {
   129.  colorWipe(strip.Color(255, 0, 0), 0);
   130.  } else if (value == 'G') {
   131.  colorWipe(strip.Color(0, 255, 0), 0);
   132.  } else if (value == 'B') {
   133.  colorWipe(strip.Color(0, 0, 255), 0);
   134.  }else if (value == '0') {
   135.  colorWipe(strip.Color(0, 0, 0), 0);
   136.  }
   137. } 
   138.  int processOneCommand()
   139.  {
   140.  int nLedNo = recvData[1] - 0x30;
   141.  char nCmdNo = recvData[2];
   142.  char cValue = recvData[3];
   143.  // 看是哪种命令，并调用相应的接口
   144.  if (nCmdNo == LED_COMMAND_SET_FLASH)
   145.  {
   146.  FlashFlag=1;
   147.  FlashValue=cValue;
   148.  }
   149.  else if (nCmdNo == LED_COMMAND_SET_COLOR)
   150.  {
   151.  FlashFlag=0;
   152.  SetColor(cValue);
   153.  }else if(nCmdNo == LED_COMMAND_STOP_FLASH){
   154.  FlashFlag=0;
   155.  SetColor('0');
   156.  }  
   157.  }
   158.  void loop() {
   159.  // put your main code here, to run repeatedly:
   160.  
   161.  while (Serial.available() > 0)
   162.  {
   163. temp = Serial.read();//获取串口接收到的数据一个一个收
   164.  if (temp == '$')
   165.  {
   166.  nRecvDataLen = 0;
   167.  }
   168.  if (nRecvDataLen < 6)
   169.  {
   170.  recvData[nRecvDataLen++] = temp;
   171.  }
   172.  if (recvData[0] == '$' && recvData[5] == '@')
   173.  {
   174.  processOneCommand();
   175.  memset(recvData, 0, sizeof(recvData));
   176.  nRecvDataLen = 0; // 已有的数据缓冲区清空
   177.  }
   178.  }
   179.  if(FlashFlag){
   180.  FlashControl(FlashValue);
   181.  }
   182.   
   183.  }
2. 功能：led灯模块和电脑PC通讯的协议
     1、控制灯闪烁
     2、设置颜色
     协议定义，PC请求和返回结果都通过该协议。共6个字节： $  LEDNO CONTROLNO VALUE CheckSUM @
     发送或请求示例：$1AR0@
     头部标志：一个字节 ：$
     LEDNO: 一个字节灯号，0,1,2,3....
     CMDNO: 一个字节控制命令号 AB ，A--设置灯闪烁 ，B--设置灯颜色
     VALUE:1个字节，颜色值RGB，红R,绿G,蓝B...无色‘0’
     CheckSUM:按位相加后取1个字节
     结束标志：@